![]() ![]() I'm looking at a simple "Extreme Keystone" task that just barely veers into low-end projection mapping. Since this is a simpler projection mapping task than the complex paid projection mappers but too complex for a projector's built-in keystone. Focus is not a problem (top and bottom is almost the same, the lenses are really good at the distances used), so I'll live with any imperfections.Įverything works perfectly, I now just need to pre-distort a video file. So there's some weird aspect ratio remapping. I have to intentionally play a portrait video distorted into a 16:9 signal because the 16:9 projector is vertically stretching due to extreme angle into something more suitable for embedding a portrait video. So I want to build compensating corrections into a custom-processed video file purposely generated for playback on this steeply-angled-upwards projector. (Fortunately the super excess lumens of the projector compensates). (Bottom edge will be above roughly the second storey level, due to steep-upwards projection angle)Īs many here probably know already, the top edge stretches a lot more than the bottom edge, and the top edge is much dimmer. ![]() I need extreme keystone correction far beyond the projector's adjustment range. ![]() My projection mapping task is very rudimentary for a projection mapper, but more complex than a projector's built in keystone. I want to shine a 5-figure lumens projector steeply angled upwards on the side of an apartment building.
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